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How do I make a transparent canvas in html5?

...e top layer to transparent at the start of rendering every new frame. I finally found the answer: it's not using globalAlpha, and it's not using a rgba() color. The simple, effective answer is: context.clearRect(0,0,width,height); ...
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Firefox Web Console Disabled?

... This happens when the page itself defines a global variable called console, for example. If the page is browser-sniffing to decide whether to define it, the behavior could differ in different browsers. In the case of Firefox it also happens when Firebug is installed and its console i...
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100% Min Height CSS layout

...prevent #container from scaling, this will work even if (or rather especially when) #content forces #container to become longer. Padding-bottom Since it is no longer in the normal flow, padding-bottom of #content now provides the space for the absolute #footer. This padding is inclu...
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Select objects based on value of variable in object using jq

...t work: termux-contact-list |jq -r '.[] | select(.name=="$1")|.number'. I call it like cool_fn Name1. However, this works: termux-contact-list |jq -r '.[] | select(.name=="Name1")|.number' – Timo Aug 18 '18 at 8:13 ...
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Android: AutoCompleteTextView show suggestions when no text entered

...old is less than or equals 0, a threshold of 1 is applied. You can manually show the drop-down via showDropDown(), so perhaps you can arrange to show it when you want. Or, subclass AutoCompleteTextView and override enoughToFilter(), returning true all of time. ...
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Undo svn add without reverting local edits

I accidentally ran svn add * and added a bunch of files that shouldn't be in the repository. I also have local edits in some files that I want to keep. Is there a simple way to just undo the svn add without reverting the local edits? The main suggestion I see on Google is svn revert , which sup...
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Django optional url parameters

...r, easier to follow way is to have multiple rules that matches your needs, all pointing to the same view. urlpatterns = patterns('', url(r'^project_config/$', views.foo), url(r'^project_config/(?P<product>\w+)/$', views.foo), url(r'^project_config/(?P<product>\w+)/(?P<pro...
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How to round the minute of a datetime object

... This does not work at all for me for long periods. e.g. roundTime(datetime.datetime(2012,12,31,23,44,59,1234),roundTo=60*60*24*7) vs roundTime(datetime.datetime(2012,12,30,23,44,59,1234),roundTo=60*60*24*7) – CPBL ...
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Keep only date part when using pandas.to_datetime

...fault represents the dates with datetime64[ns] even though the dates are all daily only. I wonder whether there is an elegant/clever way to convert the dates to datetime.date or datetime64[D] so that, when I write the data to CSV, the dates are not appended with 00:00:00 . I know I can conver...
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Can't create handler inside thread that has not called Looper.prepare()

... You're calling it from a worker thread. You need to call Toast.makeText() (and most other functions dealing with the UI) from within the main thread. You could use a handler, for example. Look up Communicating with the UI Thread in ...